P - Block Elements Test

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P - Block Elements Test - 9

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Weekly Quiz Competition

Question 1
4 / -1

Aluminium is obtained by

A
reducing Al₂O₃ with coke

B
electrolysing Al₂O₃ dissolved in Na₃ AlF₆

C
reducing Al₂O₃ with chromium

D
heating alumina with cryolite
Question 2
4 / -1

Alums are used for

A
tanning of leather

B
coagulation of blood

C
purification of water

D
All of these
Question 3
4 / -1

BCl₃ + H₂O → X, the products formed in the reaction are

A
B₂O₃ + HOCl

B
H₃BO₃ + HCl

C
B₂H₆ + HCl

D
No reaction
Question 4
4 / -1

The mass of carbon anode consumed (giving only carbon dioxide) in production of 270 kg of aluminium metal from bauxite by the Hall process is
(Atomic mass of Al = 27)

A
180 kg

B
270 kg

C
540 kg

D
90 kg

Solution
Question 5
4 / -1

Which one of the following compounds, is not a protonic acid ?

A
SO(OH)₂

B
SO₂(OH)₂

C
B(OH)₃

D
PO(OH)₃

Solution
Question 6
4 / -1

The structure of diborane (B₂H₆) contains

A
four 2c -2e ^- bonds and four 3 c -2e ^- bonds

B
two 2c - 2e ^- bonds and two 3 c -3e ^- bonds

C
two 2c -2e ^- bonds and four 3 c -2e ^- bonds

D
four 2c - 2e ^- bonds and two 3 c - 2e ^- bonds
Question 7
4 / -1

Purification of alumina takes place by

A
Bosch process

B
Hall's process

C
Hoope's process

D
quartation process
Question 8
4 / -1

The chief impurity present in red bauxite is

A
SiO₂

B
Fe₂O₃

C
K₂SO₄

D
NaF
Question 9
4 / -1

An element `X ' which occurs in the first short period has an outer electronic structure s ² p ¹ . What is the formula and acid-base character of its oxides?

A
X O₃, basic

B
X ₂O₃, basic

C
X ₂O₃, acidic

D
X O₂, acidic
Question 10
4 / -1

Aluminium Chloride exists as dimer, Al₂ Cl₆ in solid state as well as in solution of non-polar solvents such as benzene. When dissolved in water, it gives

A
Al³⁺ + 3Cl ^-

B
[Al(H₂O)₆ ]³⁺ + 3Cl ^-

C
[Al(OH)₆ ]^3- + 3HCl

D
Al₂O₃ + 6HCl

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P - Block Elements Test - 9

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P - Block Elements Test - 9

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Question 1

reducing Al2O3 with coke

electrolysing Al2O3 dissolved in Na3 AlF6

reducing Al2O3 with chromium

heating alumina with cryolite

Question 2

tanning of leather

coagulation of blood

purification of water

All of these

Question 3

B2O3 + HOCl

H3BO3 + HCl

B2H6 + HCl

No reaction

Question 4

180 kg

270 kg

540 kg

90 kg

Solution

Question 5

SO(OH)2

SO2(OH)2

B(OH)3

PO(OH)3

Solution

Question 6

four 2c -2e - bonds and four 3 c -2e - bonds

two 2c - 2e - bonds and two 3 c -3e - bonds

two 2c -2e - bonds and four 3 c -2e - bonds

four 2c - 2e - bonds and two 3 c - 2e - bonds

Question 7

Bosch process

Hall's process

Hoope's process

quartation process

Question 8

SiO2

Fe2O3

K2SO4

NaF

Question 9

X O3, basic

X 2O3, basic

X 2O3, acidic

X O2, acidic

Question 10

Al3+ + 3Cl -

[Al(H2O)6 ]3+ + 3Cl -

[Al(OH)6 ]3- + 3HCl

Al2O3 + 6HCl

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reducing Al₂O₃ with coke

electrolysing Al₂O₃ dissolved in Na₃ AlF₆

reducing Al₂O₃ with chromium

B₂O₃ + HOCl

H₃BO₃ + HCl

B₂H₆ + HCl

SO(OH)₂

SO₂(OH)₂

B(OH)₃

PO(OH)₃

four 2c -2e ^- bonds and four 3 c -2e ^- bonds

two 2c - 2e ^- bonds and two 3 c -3e ^- bonds

two 2c -2e ^- bonds and four 3 c -2e ^- bonds

four 2c - 2e ^- bonds and two 3 c - 2e ^- bonds

SiO₂

Fe₂O₃

K₂SO₄

X O₃, basic

X ₂O₃, basic

X ₂O₃, acidic

X O₂, acidic

Al³⁺ + 3Cl ^-

[Al(H₂O)₆ ]³⁺ + 3Cl ^-

[Al(OH)₆ ]^3- + 3HCl

Al₂O₃ + 6HCl